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Commitments and Contigencies (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 USD ($)
Future, minimum, non-cancellable charter revenue (1) |
Loss Contingencies [Line Items] |
Minimum contractual charter revenues | $ 76,604
Future, minimum, non-cancellable charter revenue (1) | Non-cancellable time charter agreements |
Loss Contingencies [Line Items] |
Minimum contractual charter revenues | 57,005
Future, minimum, non-cancellable charter revenue (1) | Non-cancellable freight charter agreements |
Loss Contingencies [Line Items] |
Minimum contractual charter revenues | 19,599
Future, minimum, charter-in hire payments (2) |
Loss Contingencies [Line Items] |
Commitments under existing charter-in agreements | 14,659
Future, minimum, charter-in hire payments (2) | Non-cancellable time charter agreements |
Loss Contingencies [Line Items] |
Commitments under existing charter-in agreements | 13,451
Future, minimum, charter-in hire payments (2) | Non-cancellable freight charter agreements |
Loss Contingencies [Line Items] |
Commitments under existing charter-in agreements | $ 1,208
Bareboat commitments charter hire (4) |
Loss Contingencies [Line Items] |
Variable portion of payment to SWS owner | 3-month LIBOR rate of 2.33575%

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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Future minimum rental payments in aggregate as of the balance sheet date under operating leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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